From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Performance test of different types of battery cells.
| Identifier | ExFiles\Box 54\1\ Scan261 | |
| Date | 13th June 1928 guessed | |
| RR 238 (150 BKS.) (DD 431-8 12 24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. To E.F.b. (2) Order No. S.P. A2. Customer's No. Initial Amperes = 99.5 Time to 90 " = 7.5 mins " " 80 " = 8.4 " All cells shewed negative weakness. Both of these results are poor, but this is due to the poor capacity of the Oldham and Fuller cells. The Exide and P & R cells being approx: equal. Signed S.D. This Sheet must be filed on completion of the work. | ||